Governor-blade pump.



L. S. REED.

Patented Jan. 8, 1918.

2 SHEETS-SHEET 1.

L. S. REED.

GOVERNOR BLADE PUMP.

APPLICATION FILED JULY 25. !9l6.

1,252,841. Patented Jan.8,1918.

2 SHEETS-SHEET 2- glnoen fox sans PATENT @FJFEGE.

LEO SCOTT REED, 01 MOKEESPORT, PENNSYLVANIA, ASSIGNOR T0 WILEY PUMP 62 I MANUFACTURING (70., OF MOKEEESPORT, PENNSYLVANIA, A CORPORATION OF PENN- SYLVANIA.

GOVERNOR-BLADE PUMP.

aeaastr.

\ Specification of Letters Patent.

Patented Jan. 8, 1918.

Application filed July 25, 1916. SeriaLNo. 111,292.

To all whom it may concern:

Be it known that 1, Leo Scorr Reno, a citizen of the United States residing at Me- Keesport, in the county of Allegheny and State of Pennsylvania, have invented certain new and useful Improvements in Governor- Blade Pumps, of which the following is a specification.

This invention relates to pumps of that class which comprise a casing having an approximately cylindrical pressure chamber with inlet and outlet ports arranged near one end of a diameter thereof, and having a rotor mounted therein in eccentric position which brings it close to the wall of the cham- 4 her at a point between the inlet and outlet, and with a diametric blade reciprocating in the rotor, so as to present its ends alternately in working position to develop driving walls of changing radial dimension in the crescent-shaped pressure space.

Pumps of this general type have heretofore been found to be objectionable, owing to the constant grinding of the ends of the blade against the wall of the pressure chamber. Attempts have been made to control this condition by using a plurality of blades and providing each with a guiding member that travels in an annular track for both protruding and withdrawing the blade that carries it; butsuch arrangements are com-. plicated in structure, expensive to maintain, and not satisfactory in use.

\According to the present invention, a single blade mounted diametrically in the rotor in position to protrude its respective ends alternately into the working space, is provided with a common governor device located at an intermediate point in the diametric dimension of the blade, and coacting with the track of relatively small circumference which acts upon the governor alternately in a direction appropriate to each bladeend as it reaches the osition in which the blade end must act. s a consequence, the functional characteristic of an accurately overned blade is-realized in an exly simple and durable construction. The invention consists not only in the broad characteristic above referred to, but in certain details of construction whereby the inventionis realized in a practical and desirable manner, as will be hereinafter fully described and particularly pointed out in the claims.

In the accompanying drawings, which showone embodiment of the invention by way of illustration,

Figure 1 is an end elevation of the pump with its shaft in section;

Figs. 2 and 3 show, by segregated perspective views, the rotor and its diametric blade; N

Fig. 4 is an end elevation of the pump with its face plate removed and the walls of its intake and discharge passages partly in section,

Fig. 5 is an axial sectional view with the rotor partly in section, and

Fig. 6 is an inner face view of the end plate, which provides a sealing groove for the end of. the rotor and a circular track for the blade governor.

1 represents the casin provided with an intake passage 2 and a discharge passage 3, and having a pressure chamber 4. The passages 2 and 3 are located on opposite sides of one end of a diameter of the chamber 4, namely, its vertical diameter in the embodiment of the invention selected for illustration. Within the chamber. 4 is a cylindrical rotor 5 having a shaft 6 and mounted eccentrically in the chamber, so that it closely approaches the wall at a point between the passages 2 and 3 and develops a crescent-shaped pressure space, as shown. Rotor 5 has the stepped bearin 7 in the rear wall of the caslng in additlon to the bearing 8 for its shaft 6, and thus closes the chamber against the escape of fluid at that end of the rotor, while at its forward end, said rotor has an axially extending annular flange 9 fitted in .,'a sealing groove 10 that closes the pressure chamber at that end. Formed diametrically through the rotor 5 is the slot 11 for the blade 12, and the latteris of such dimension in the direction of the diameter of the rotor as will adapt its respective ends to project radially beyond the rotor, a distance to efi'ecof rotation, from an intermediate point on an edge of the blade, and this stud coacts with a circular track 14, shown by full lines in Figs. 5 and 6 and by dotted lines in Fig. 4. The acting surface of the stud 13 is cylindrical and the stud, therefore, contacts with'the track 14 theoretically ona single line parallel to the axis of rotation, so that friction is reduced to a minimum. Moreover,'it acts to positively limit protrusion of that end of the blade which is traveling from the lesser to the greater dimension of the pressure space, and to positively retract said end when moving from the greater to the lesser dimension thereby overcoming outward thrust of the blade due to centrifugal force which develops strongly whenever a preponderance of the mass of the blade is on one side or the center of revolution. Again the stud 13 is adapted to rotate in its bearing, and thus gradually change its surface line of contact or roll its cylindrical bearing surface over the/cylindrical surface of the guide track 12. This stud is recessed I 25 into the blade 12. and thereby im arts its thrust to the blade, and it is con ned laterally by the walls of the recess 15 in the .rotor, which wholly relieves the blade from side thrust developed from the governor.

Inasmuch as the blade coincides with the diameter of a pressure chamber at one time and a chord of said chamber at another time, owing to the eccentric position of the rotor,

' the pressure chamber is somewhat flattened froma true cylinder; that is to say, its

. horizontal diameter is somewhat greater than its Vertical diameter.

In operation, the pump will be rotated clockwise, as found in Figs. 1 and 4.

In practice, either or both of the end walls of the pressure chamber will be provided by.

the removable heads 1" or 1", and the sealing groove 10 and circular track 14 are turned into the inner face of one of the heads, 1". The pressure blade 12 fit accurately be tween the heads as well as between the walls of the slot 11, and the sealing flange 9 intersects the face of the head against which the blade abuts.- Hence, the position-governing parts are inclosed within an inner housing and entirely separated from the pressure chamber, and do not causediamet 1. In a rotary apparatus of the class de-' scribed, a housing having a chamber, a.

' rotor-eccentrically mounted in said chamber,

a blade projecting through the rotor and presenting both of its ends alternately in scribed, a housing having a chamber, a rotor eccentrically mounted in said chamber, a blade projecting through the rotor and presenting its respective ends alternately in.

working position; and a position governor for said blade, mounted intermediately thereon and having a guide track with which it cooperates to present the blades alternately in working position; said governor comprising a stud having a cylindrical bearing face, and said track comprising a circular wall within which the stud travels; said stud being rotatable to change its bearing face.

3. In a rotary apparatus of the class described, a housing having a chamber, a rotor eccentrically mounted in said chamber, a blade projecting through the rotor and presenting its respective ends alternately in working position; and a position governor for said blade, mounted intermediately thereon and having a guide track with which it cooperates to present the blades alternately in working position; said governor comprising a stud, and said track comprising a circular wall within which the stud travels; said stud having bearings against the blade in the direction of thrust which it imparts ,thereto, and having bearings against the rotor in a direction transverse to said thrust.

4. In a rotary apparatus of the class described, the combination of a housing having a pressure chamber with intake and outlet vpassages communicating therewith, a rotor eccentrically mounted in said chamber and constructed with a diametric slot extending from one end face through the greater portion of its axial dimension, and with a guide groove'in said face, a pressure blade working in a diametric .slot of the rotor, a governor stud having thrust bearings against the pressure blade in the direction of its length, and having bearings in the guide groove in a direction transverse thereto, and an end wall of thevcasing having a circular guiding wall coacting with said stud to develop movements in the latter in directions to protrude, alternately, the ends of the blade. a

5. In a rotary apparatus of the character described, acasing having an approximately cylindrical pressure chamber with inlet and outlet passages 'ongopposite sides ,of one end of the diameter thereof; a rotor of less diameter than said chamber, mounted therein in position to approach closely to the wall of the chamber between its inlet and outlet passages, said rotor having a diametric slot extending from one end face thereof through the greater portion of its axial dimension,

and having on said end face, an axially extending peripheral flange and a diametric guide groove within the flange, communicating with the diametric slot; a pressure blade Working in said slot and adapted to'present its respective ends alternately beyond the rotor to develop pressure walls Within the chamber; a governor stud countersunk in a diametrically extending edgeof the pressure blade and fitting between the Walls of the guide groove in'the rotor; and an end Wall of the casing, having a circular track coacting with the governor stud to protrude the ends of the blade in proper order, and

having a sealing groove surrounding said track and receiving the end flange on the rotor.

6. In a rotary device of the character described, a casing having a pressure chamber, a rotor eccentrically mounted therein and having a diametric pressure blade, a position governor for said blade located Within the perimeter of the rotor, and an inner housing for said governor separating it from the pressure chamber; said inner housing comprising an annular flange and a sealing groove, one carried by the end Wall of the pressure chamber, and the other by the rotor.

The foregoing specification signed at Me- Keesport, Pennsylvania, this 12th day of July, 1916.

LEO soorr REED. 

